PLEASE HELP! PTO ISSUE

mwilliams199

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Oct 29, 2020
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SCAG 48'' WALK BEHIND MANUAL START
MODEL: SW48-14KH

I HAVE RECENTLY PURCHASED THIS MOWER FROM AN ONLINE SELLER WHO NOTED THE WIRE HARNESS WAS MISSING. I FIGURED IT BEING A MANUAL START THE ONLY THING I NEEDED ANY WIRING FOR WOULD BE FROM THE VOLTAGE REGULATOR TO THE PTO WITHOUT ADDING THE SAFTIES BACK IN, WHICH I PLAN TO DO EVENTUALLY IF I CAN GET THE PTO TO ENGAGE. SO IM BY NO MEANS A LAWN MOWER EXPERT BUT HAVE A DECENT KNOWLEDGE OF WIRING AND ELECTRICITY. I FOUND THE ORIGINAL VOLTAGE REGULATOR TO BE FAULTY. IT WAS SUPPLYING ROUGHLY 25VDC ON THE OUTLET SIDE. THANKFULLY THE PTO WAS NO COMPROMISED DURING THAT ISSUE. THIS IS WHAT I HAVE DONE SO FAR. TESTED THE PTO WITH AN EXTERNAL BATTERY SEEING HOW THIS MOWER ISNT EQUIPED WITH AN ELETRIC START, PTO ENGAGES WITH NO ISSUES. REPLACED THE VOLTAGE REGULATOR. I HAVE ADDED A GROUND WIRE FROM THE MOUNTING BOLT TO THE BLOCK TO ENSURE GROUND. I HAVE 38-40VAC IN AND 10-11VDC AT 2800 RPMS WHICH I REALIZE SHOULD BE SLIGHTLY HIGHER BUT I WOULD EXPECT THE PTO TO ENGAGE WITH 10-11VDC AND I COULD BE WRONG. REPLACED THE SWITCH. I GET 10-11VDC TO THE SWITCH. WHEN ITS NOT ENGAGED OR CLOSED I GET VOLTAGE BETWEEN MY PTO HOT LEG AND MY VDC FROM MY VR. BUT WHEN ENGAGED I GET 0VDC. EVEN WHEN I BYPASS THE SWITCH AND GO FROM THE VR TO THE PTO AND GROUND MY PTO TO THE BLOCK I GET NOTHING. ANY ADVICE AT THIS POINT IS GREATLY APPRECIATED AND SORRY FOR THE LONG POST. I HAVE DONE A LOT OF WORK TO THIS MOWER AND HAVE A LOT INVESTED SO IM ALL IN AT THIS POINT.
 

Rivets

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Two things, turn off the caps lock and provide us with the make and model numbers for your engine. That way we will be able to see what you are working on and provide you with a path to proceed.
 

mwilliams199

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I f
Two things, turn off the caps lock and provide us with the make and model numbers for your engine. That way we will be able to see what you are working on and provide you with a path to proceed.
I got it resolved. Thanks for your concern though. I didn’t realize typing in caps was such an issue.
 

4950cycle

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Aug 18, 2013
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The " caps " comment was kinda funny though. lol
 

Rivets

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To us old farts caps are difficult to read and sound like you are shouting at us. Worse yet is all caps and bold, those I ignore.
 
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